ALIENS may not be able to conquer space travel as the gravity on their home planet may be too strong for them to escape from, according to a new theory which could explain why we are yet to meet extraterrestrials.
Aliens could be STRANDED on own planets because gravity is TOO strong
ALIENS may not be able to conquer space travel as the gravity on their home planet may be too strong for them to escape from, according to a new theory which could explain why we are yet to meet extraterrestrials.
